Question

calculate the distance

Answer 1

velocity=displacement/time
So, displacement or distance=time*velocity
time=20-10=10
velocity=20
therefore displacement or distance=20*10=200

Answer 2

Answer:

Given –

• Velocity-Time graph.
• Here the velocity shown is 20 m/s.
• And the tital time is 20 seconds.

To Find –

• Distance travelled in last 10 seconds.

Solution –

A velocity - time graph represents acceleration.

Acceleration is said to be rate of change of velocity.

Velocity is given as 20 m/s.

Velocity = Displacement ÷ Time

The displacement or distance we need to find is for last 10 seconds.

Hence, 20 = Distance ÷ 10

➸ 20 × 10

➸ 200 m

➸ 200 mHence, Total distance travelled by the body in last 10 seconds is 200 metres.

TERMINOLOGY :–

• Distance is said to be the path length travelled.
• Displacement is the shortest distance between the initial position and the final position of the body.
• Speed is said to be the distance distance covered per unit time.
• Velocity is displacement per unit time.
• Speed and distance are scalar quantity whereas displacement and velocity a vector quantity.